jpayne@69: #!/usr/bin/env python3
jpayne@69: """      turtle-example-suite:
jpayne@69: 
jpayne@69:         tdemo_bytedesign.py
jpayne@69: 
jpayne@69: An example adapted from the example-suite
jpayne@69: of PythonCard's turtle graphics.
jpayne@69: 
jpayne@69: It's based on an article in BYTE magazine
jpayne@69: Problem Solving with Logo: Using Turtle
jpayne@69: Graphics to Redraw a Design
jpayne@69: November 1982, p. 118 - 134
jpayne@69: 
jpayne@69: -------------------------------------------
jpayne@69: 
jpayne@69: Due to the statement
jpayne@69: 
jpayne@69: t.delay(0)
jpayne@69: 
jpayne@69: in line 152, which sets the animation delay
jpayne@69: to 0, this animation runs in "line per line"
jpayne@69: mode as fast as possible.
jpayne@69: """
jpayne@69: 
jpayne@69: from turtle import Turtle, mainloop
jpayne@69: from time import perf_counter as clock
jpayne@69: 
jpayne@69: # wrapper for any additional drawing routines
jpayne@69: # that need to know about each other
jpayne@69: class Designer(Turtle):
jpayne@69: 
jpayne@69:     def design(self, homePos, scale):
jpayne@69:         self.up()
jpayne@69:         for i in range(5):
jpayne@69:             self.forward(64.65 * scale)
jpayne@69:             self.down()
jpayne@69:             self.wheel(self.position(), scale)
jpayne@69:             self.up()
jpayne@69:             self.backward(64.65 * scale)
jpayne@69:             self.right(72)
jpayne@69:         self.up()
jpayne@69:         self.goto(homePos)
jpayne@69:         self.right(36)
jpayne@69:         self.forward(24.5 * scale)
jpayne@69:         self.right(198)
jpayne@69:         self.down()
jpayne@69:         self.centerpiece(46 * scale, 143.4, scale)
jpayne@69:         self.getscreen().tracer(True)
jpayne@69: 
jpayne@69:     def wheel(self, initpos, scale):
jpayne@69:         self.right(54)
jpayne@69:         for i in range(4):
jpayne@69:             self.pentpiece(initpos, scale)
jpayne@69:         self.down()
jpayne@69:         self.left(36)
jpayne@69:         for i in range(5):
jpayne@69:             self.tripiece(initpos, scale)
jpayne@69:         self.left(36)
jpayne@69:         for i in range(5):
jpayne@69:             self.down()
jpayne@69:             self.right(72)
jpayne@69:             self.forward(28 * scale)
jpayne@69:             self.up()
jpayne@69:             self.backward(28 * scale)
jpayne@69:         self.left(54)
jpayne@69:         self.getscreen().update()
jpayne@69: 
jpayne@69:     def tripiece(self, initpos, scale):
jpayne@69:         oldh = self.heading()
jpayne@69:         self.down()
jpayne@69:         self.backward(2.5 * scale)
jpayne@69:         self.tripolyr(31.5 * scale, scale)
jpayne@69:         self.up()
jpayne@69:         self.goto(initpos)
jpayne@69:         self.setheading(oldh)
jpayne@69:         self.down()
jpayne@69:         self.backward(2.5 * scale)
jpayne@69:         self.tripolyl(31.5 * scale, scale)
jpayne@69:         self.up()
jpayne@69:         self.goto(initpos)
jpayne@69:         self.setheading(oldh)
jpayne@69:         self.left(72)
jpayne@69:         self.getscreen().update()
jpayne@69: 
jpayne@69:     def pentpiece(self, initpos, scale):
jpayne@69:         oldh = self.heading()
jpayne@69:         self.up()
jpayne@69:         self.forward(29 * scale)
jpayne@69:         self.down()
jpayne@69:         for i in range(5):
jpayne@69:             self.forward(18 * scale)
jpayne@69:             self.right(72)
jpayne@69:         self.pentr(18 * scale, 75, scale)
jpayne@69:         self.up()
jpayne@69:         self.goto(initpos)
jpayne@69:         self.setheading(oldh)
jpayne@69:         self.forward(29 * scale)
jpayne@69:         self.down()
jpayne@69:         for i in range(5):
jpayne@69:             self.forward(18 * scale)
jpayne@69:             self.right(72)
jpayne@69:         self.pentl(18 * scale, 75, scale)
jpayne@69:         self.up()
jpayne@69:         self.goto(initpos)
jpayne@69:         self.setheading(oldh)
jpayne@69:         self.left(72)
jpayne@69:         self.getscreen().update()
jpayne@69: 
jpayne@69:     def pentl(self, side, ang, scale):
jpayne@69:         if side < (2 * scale): return
jpayne@69:         self.forward(side)
jpayne@69:         self.left(ang)
jpayne@69:         self.pentl(side - (.38 * scale), ang, scale)
jpayne@69: 
jpayne@69:     def pentr(self, side, ang, scale):
jpayne@69:         if side < (2 * scale): return
jpayne@69:         self.forward(side)
jpayne@69:         self.right(ang)
jpayne@69:         self.pentr(side - (.38 * scale), ang, scale)
jpayne@69: 
jpayne@69:     def tripolyr(self, side, scale):
jpayne@69:         if side < (4 * scale): return
jpayne@69:         self.forward(side)
jpayne@69:         self.right(111)
jpayne@69:         self.forward(side / 1.78)
jpayne@69:         self.right(111)
jpayne@69:         self.forward(side / 1.3)
jpayne@69:         self.right(146)
jpayne@69:         self.tripolyr(side * .75, scale)
jpayne@69: 
jpayne@69:     def tripolyl(self, side, scale):
jpayne@69:         if side < (4 * scale): return
jpayne@69:         self.forward(side)
jpayne@69:         self.left(111)
jpayne@69:         self.forward(side / 1.78)
jpayne@69:         self.left(111)
jpayne@69:         self.forward(side / 1.3)
jpayne@69:         self.left(146)
jpayne@69:         self.tripolyl(side * .75, scale)
jpayne@69: 
jpayne@69:     def centerpiece(self, s, a, scale):
jpayne@69:         self.forward(s); self.left(a)
jpayne@69:         if s < (7.5 * scale):
jpayne@69:             return
jpayne@69:         self.centerpiece(s - (1.2 * scale), a, scale)
jpayne@69: 
jpayne@69: def main():
jpayne@69:     t = Designer()
jpayne@69:     t.speed(0)
jpayne@69:     t.hideturtle()
jpayne@69:     t.getscreen().delay(0)
jpayne@69:     t.getscreen().tracer(0)
jpayne@69:     at = clock()
jpayne@69:     t.design(t.position(), 2)
jpayne@69:     et = clock()
jpayne@69:     return "runtime: %.2f sec." % (et-at)
jpayne@69: 
jpayne@69: if __name__ == '__main__':
jpayne@69:     msg = main()
jpayne@69:     print(msg)
jpayne@69:     mainloop()